Checkerwork



June 24, 1930. G. L. DANFORTH, JR., Er AL L7662S3 CHE CKERWORK Filed July 31, 192s z sheets-sheet 1 Rf l 1 l 'III ull,

||| Ill I l l hui June 24, 1930,.` Q L, DANFORTH, JR, Er AL 1,766,283

CHEGKERWORK Filed July :51, 1928 -2 sheets-sheet 2 11 17u17 ZM 'yi vi 'l Paented June 24, 1930 I UNiTED STATES GEORGE L. DANB'OBTH, JB., AND .ALBERT E. FETERSON, 0F CHICAGO, ILLINOIS,

y `mazze PATENT oFrlcs.

SSIGNOBS TO OPEN HEARTH COMBUSTION COMPANY, OF CHICAGO, ILLINOIS, A

GOEPOBATEON OF ILLINOIS CHECIKEBWOBK applicati@ mea July 31,

This invention relates to a new and improved checkerwork and more particularly .to improved brick and checkerwork construction particularly adapted for use in regenerators or the like.

improved form of checker-brick and checkerwork construction is covered in the Patent No. 1,687,786, granted October 16, 1928, to Albert E. Peterson. The present invention is in the nature of an improve# ment on the construction of this prior a plication. the prior application a sing e form of brick was shown and in the present application we have` shown several addi-- tional forms of brick adapted for use in making the checkerwork more stable and uniform where it comes in contact with walls of regenerator chambers, and also where enlarged flues are formed in the checkerwork. The single brick of the prior application was especially adapted for use in forming regenerators of uniform construction. where the lues are defined by single bricks on all sides. v

It is an object of the present invention to provide new and improved checkerwork and bricks therefor adapted to present a stable and uniform structure.

lt is an additional object to provide a construction of this character in which both verical and horizontal iues of sizes corresponding to multiples of bricks maybe formed with the bricks adjacent the iues fully supported.

lt is an additional object to provide a construction in which the top courses may be fully supported and rendered stable and ma present an approximately level surface.

t is also an object to provide' a construc- 40 tion adapted to adequately support the brick which may be located adjacent the regenerator walls.

Itv is a further object to provide a construction of this character aiording `both horizontal and vertical iuea 1928. serial no. 296,581.

the description proceeds.

We have shown .certain preferred embodi# ments of our invention in the accompanying drawings, in whichv Figure 1 is a fragmentary perspective view of a checkerwork construction accordin vto our invention;

igure 2 is a cross section of a checkerwork construction; and

Figures 3, 4, 5 and 6 are perspective Views of the different individual brickI used' in forming our checkerwork. p

Thebrick of Figure 5 is of the type disclosed in the Peterson application above referred to. This brick 1 1 is of a rectangular shape and in its lower corners has formed the notches 12 and 13. These notches 12 and 13 are of a horizontal extent longitudinally of the brick equal to substantially onehalf of the thickness of the brick. The;

form of brick 14 shown in Figure 6 is simi-l larto that in Figure 4, the notch 15 being identical with the notch 12 of brick 11. The v notch 16, however, has a horizontal dimension longitudinally of the brick twice that of the notch 15, or, in other' words, e ual .substantially tothe thickness of the br1ck.-

It will be understood that the -brick 14 is longer than the brick 11 by an amount equal to one-half this length of the notch 16.

Referring now to Figure 3, the brick 17A is of increasedwidth or height and is provided on its lower corners with the notches 18 and 19, which are identical with the. dimensions of notches 12 and 13 of brick 11, and also the notchl 15 of brick 14. The upper corners of the brick 17 are provided with notches 20 and 21.` These notches are of an extent longitudinally of the buck equal to, the notches 18 and 19. Vertlcally of the brick the notches` 20 and 21 are of an `the standard form.

Yformed by brick 11.

tion of the brick 24 is similar to the brick 28 is equal in horizontal dimension to the notch 26 and in vertical dimension to the notch 27.

These brick are shown incorporated in a checkerwork in Figures 1 and 2. In Figure 1, the upper transverse courses in the rear as shown consists entirely of brick 11 which are The brick 17 are shown in the uppermost courses extending along the sides of the upper portion of the open flues shown in Figure 1. The sides of this flue correspond to two brick lengths in extent, less the overlapping notches at the ends. These brick 17 are laid in the plane of the next to the top course of brick and their upper portions extend into the plane of the uppermost course of brick. rlhe up-` per extensions on the brick. 17 thus serve to give lateral support to the brick 14 in the courses crossing them The laterally extending brick 14 have their extended ends abutting the plane of the brick forming the side walls of the enlarged flue. The notches 1G thus rest on top of the brick forming the side walls of the llue of which the top courses are flush with the side walls of the flue. The brick 24 are used in the uppermost courses of brick which intersect the middle sides of the flue of which the top courses are rllhese brick 24 thus havetheir long notches26 restiny on brick l1 and their ends flush with the inner wall of the flue. f l

At the lower portion of Figure 1 several larger lateral flues 30 are shown opening into the large vertical flues. These flues 30 'are also shown in Figure 2. These lues may extend in all four directions from the enlarged vertical lues and are formed by omitting certain of the brick 11 and by usin brick 14 Iadjacent the flues. These enlarged vertical and horizontal fiues form important channels for the introduction of the gases into thecheckerwork and serve with particular utility when the smaller upper lues have become clogged with iue dust and the like. The effective life of the checkerwork is thereby increased and the draft losses reduced.

The brick 17 with their upper extensions are particularly important in that they funci tion to render stable the brick crossing them at right angles. This stability is more important than the fact that a substantially uniform ytopsurface is presented. With the increased stability, means ma be used for blowing out accumulated flue ust withyoilt dislodging the brick.

ybricks and such additional larger horizontally extending fines may be'constructed as may be desired.

Bythe use of the brick of the general form'shown, the brick will be fully supported at all times and flush surfaces will be presented in the flues and upon the top of the checkerwork. We contemplate, such changes and modifications as come within the spirit and scope of the appended claims.

`We claim:

1. A brick for checkerwork construction comprising a rectangular `shaped member having notched 'out portions at adjacent corners, one of said notches being substantially twice the extent of the other notch, said larger notch being of an extent in one direction substantially equal to the thickness of the brick.

2. A brick for checkerwork construction comprising a rectangular shaped member having notched out portions in all its four corners, thc notched out portions on two adjacent corners being of, substantially donble the extent in one dimension of those on the remaining two corners and being of an extent substantially cqualto the thickness of the brick.

3.- Checkerwork construction for regenerators comprising in combination a plurality of horizontal coursesl of brick extending at right angles to adjacent courses, to form vertical liues, the brick having notches on their corners whereby the bricks of each course serve to lock the bricks of an adjacent. course against displacement, certain vof said notches having an' extent longitudinally of the brick equal to the thickness of the brick.

4. Checkerwork construction for regenerators comprising in combination a plurality of horizontal courses of brick extending at right angles to-'adjacent courses to form vertical 'and horizontal flues, the brick having notches on their corners whereby .the bricks of each course serve to lock the incense an adjacent course against displacement, certain of said brick being 4of a height as laid in the checkerwork sucient to give lateral support to brick extending transversely thereof in superposed courses, saidbrick having notches at. all four corners. 6. Checkerwork construction for regenerators comprising in combination a plurality of horizontaly courses of brick extendingV at right angles to adjacent courses to form vertical and horizontal ues, the brick having notches on their corners whereby the bricks of each course serve to lock the bricks of an adjacent courseagainst displacement, certain of said brick being of a height as laid in the locked vertically adjacent courses ofbrick, said brick having notches at all four corners,

and having their upper surfaces substantially in the plane of the top of the top course.

7. Checkerwork construction for regenerators comprising in combination a plurality of horizontal courses oi brick extending at ators comprising in combination a plurality lbrick being so placed as to of horizontal courses of brick extending. atv

right angles to adjacent' courses, to form vertical and horizontal iues certain ofsaid form larger vertical ues approximately equal in lateral dimensions to a pluralityof brick, and enlarged horizontal ues communicating with said larger vertical iiues.

9. Checkerwork construction for regener-v ators comprising in combination a plurality of horizontal courses of brick extending at ',n. uw)

of each course serve to lock the bricks of an adjacent course against displacement,` certain ofthe brick being so placed as yto checkerwork equal to the height of two interv and being laid in the next to the top course right angles to adjacent courses to form verytical and horizontal ues, the brick being stood on edge and provided with notches inl certain otheir corners whereby the bricks of eachcourse serve to lock the bricks of an adjacent course against displacement, certain of the brick being so placed as to. form larger vertical. iiues having lateral dimer?- sions approm'mately equal to a plurality of brick. i A j 10. Checkerwofk construction for regenerators comprising in combination a pluralit of horizontal courses 'of brick extending a right angles to'adjacent courses to form vertical and horizontallues the brick being V"stood,onedgei and providedwith notches in certain of their corners whereby the bricks ice 

